5. Lay the computer on its side and remove the four screws at the rear of the chassis that secure the
power supply assembly.
Figure 48. Removing the screws for the power supply assembly
6. Slide the power supply assembly to the front of the computer and then lift it out of the chassis.
7. Ensure that the new power supply assembly is the correct replacement.
8. Install the new power supply assembly into the chassis so that the screw holes in the power supply
assembly align with those in the chassis.
9. Install and tighten the four screws to secure the power supply assembly.
Note:
Use only screws provided by Lenovo.
10. Reconnect the power supply assembly cables to the system board and each of the drives.
11. Secure the power supply assembly cables with the cable clips and ties in the chassis.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 142.
Replacing the heat sink and fan assembly
Important:
Before you replace any FRU, be sure to read and understand Chapter 1 “Safety information”
on page 1.
CAUTION:
The heat sink and fan assembly might be very hot. Before you open the computer cover, turn off the
computer and wait several minutes until the computer is cool.
To replace the heat sink and fan assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 83.
3. Lay the computer on its side for easier access to the system board.
4. Locate the heat sink and fan assembly. See “Locating parts on the system board” on page 72.
Chapter 8
.
Replacing FRUs
105
Summary of Contents for ThinkStation P300
Page 1: ...ThinkStation P300 Hardware Maintenance Manual Machine Types 30AG 30AH 30AJ and 30AK ...
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Page 13: ...Chapter 1 Safety information 7 ...
Page 17: ...Chapter 1 Safety information 11 ...
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Page 19: ...1 2 Chapter 1 Safety information 13 ...
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Page 76: ...Figure 3 Locating major FRUs and CRUs 70 ThinkStation P300 Hardware Maintenance Manual ...
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